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* hurd/hurd/signal.h (struct hurd_sigstate): New member `preempters'.

Browse Source 
(hurd_preempt_signals, hurd_unpreempt_signals): Decls removed.
	* hurd/hurd/sigpreempt.h: New file.
	* hurd/preempt-sig.c: Rewritten with new interface.
	* sysdeps/mach/hurd/jmp-unwind.c (_longjmp_unwind): Remove local signal
	preempters being unwound past.

	* db: New directory, 4.4 BSD db package incorporated from BSD db-1.85
	release.

	* sysdeps/unix/sysv/linux/sys/param.h: Several new macros for BSD
	compatibility.
This commit is contained in:
Roland McGrath
1996-01-02 08:57:42 +00:00
parent fc4026d8e4
commit 71733723fb
49 changed files with 11652 additions and 107 deletions
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83
hurd/preempt-sig.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1994 Free Software Foundation, Inc.
/* Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -16,52 +16,53 @@ License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <hurd/sigpreempt.h>
#include <hurd/signal.h>
#include <assert.h>
/* Initialize PREEMPTER with the information given and stick it in the
chain of preempters for SIGNO. */
int
hurd_preempt_signals (struct hurd_signal_preempt *preempter,
int signo, int first_code, int last_code,
sighandler_t (*handler) (thread_t, int, long int, int))
void
hurd_preempt_signals (struct hurd_signal_preempter *preempter)
{
if (signo <= 0 || signo >= NSIG)
{
errno = EINVAL;
return -1;
}
preempter->first = first_code;
preempter->last = last_code;
preempter->handler = handler;
__mutex_lock (&_hurd_signal_preempt_lock);
preempter->next = _hurd_signal_preempt[signo];
_hurd_signal_preempt[signo] = preempter;
__mutex_unlock (&_hurd_signal_preempt_lock);
return 0;
__mutex_lock (&_hurd_siglock);
preempter->next = _hurdsig_preempters;
_hurdsig_preempters = preempter;
_hurdsig_preempted_set |= preempter->signals;
__mutex_unlock (&_hurd_siglock);
}
/* Remove PREEMPTER from the chain for SIGNO. */
int
hurd_unpreempt_signals (struct hurd_signal_preempt *preempter, int signo)
void
hurd_unpreempt_signals (struct hurd_signal_preempter *preempter)
{
struct hurd_signal_preempt *p, *lastp;
if (signo <= 0 || signo >= NSIG)
{
errno = EINVAL;
return -1;
}
__mutex_lock (&_hurd_signal_preempt_lock);
for (p = _hurd_signal_preempt[signo], lastp = NULL;
p != NULL; lastp = p, p = p->next)
if (p == preempter)
struct hurd_signal_preempter **p;
sigset_t preempted = 0;
__mutex_lock (&_hurd_siglock);
p = &_hurdsig_preempters;
while (*p)
if (*p == preempter)
{
(lastp == NULL ? _hurd_signal_preempt[signo] : lastp->next) = p->next;
__mutex_unlock (&_hurd_signal_preempt_lock);
return 0;
/* Found it; take it off the chain. */
*p = (*p)->next;
if ((preempter->signals & preempted) != preempter->signals)
{
/* This might have been the only preempter for some
of those signals, so we must collect the full mask
from the others. */
struct hurd_signal_preempter *pp;
for (pp = *p; pp; pp = pp->next)
preempted |= pp->signals;
_hurdsig_preempted_set = preempted;
}
__mutex_unlock (&_hurd_siglock);
return;
}
__mutex_unlock (&_hurd_signal_preempt_lock);
errno = ENOENT;
return -1;
else
{
preempted |= (*p)->signals;
p = &(*p)->next;
}
__mutex_unlock (&_hurd_siglock); /* Avoid deadlock during death rattle. */
assert (! "removing absent preempter");
}